Vulnerability · Published Jun 29, 2026 · Assigned by CPANSec
CVE-2026-13593CSS::Minifier::XS versions before 0.14 for Perl have a memory leak when the entire document is minified away
Medium 6.5
In plain English
A medium-severity memory leak in CSS::Minifier::XS from GTERMARS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.3%top 78.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
CSS::Minifier::XS versions before 0.14 for Perl have a memory leak when the entire document is minified away. The minify function has a memory leak when processing a document containing only characters to be removed, such as comments and whitespace.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | perl-css-minifier-xs | 0.16-r0 | ALPINE-CVE-2026-13593 |
| Debian:12 | libcss-minifier-xs-perl | no fix listed | DEBIAN-CVE-2026-13593 |
| Debian:13 | libcss-minifier-xs-perl | no fix listed | DEBIAN-CVE-2026-13593 |
| Debian:14 | libcss-minifier-xs-perl | 0.14-1 | DEBIAN-CVE-2026-13593 |
| Ubuntu:22.04:LTS | libcss-minifier-xs-perl | no fix listed | UBUNTU-CVE-2026-13593 |
| Ubuntu:24.04:LTS | libcss-minifier-xs-perl | no fix listed | UBUNTU-CVE-2026-13593 |
| Ubuntu:25.10 | libcss-minifier-xs-perl | no fix listed | UBUNTU-CVE-2026-13593 |
| Ubuntu:26.04:LTS | libcss-minifier-xs-perl | no fix listed | UBUNTU-CVE-2026-13593 |
| Ubuntu:26.10 | libcss-minifier-xs-perl | no fix listed | UBUNTU-CVE-2026-13593 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| GTERMARS | CSS::Minifier::XS | 0 – before 0.14 |
Weakness: CWE-401 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N